Heart morphology in wild and farmed Atlantic salmon Salmo salar and rainbow trout Oncorhynchus mykiss

Diseases of Aquatic Organisms

Gjermund Gunnes¹  Trygve T. Poppe¹  Brit Tørud¹  Renate Johansen¹ 

关键词: Heart morphology;    Ventricular shape;    Salmonids;    Bulbus arteriosus;    Salmo salar;    Oncorhynchus mykiss;   

DOI  :  10.3354/dao057103

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: The normal shape of the salmonid ventricle is a triangular pyramid with the apex pointing caudoventrally. A strong positive correlation has been established between this shape and optimum cardiac output and function. Domesticated salmonidsappear to have developed a more rounded ventricle with misaligned bulbus arteriosus. Several reports from fish health veterinarians indicate that fish with abnormal heart morphology have a high mortality rate during stress-inducing situations likegrading, transportation and bath treatments. The present paper compares and describes the ventricle morphology of wild vs. farmed Atlantic salmon, and wild steelhead (anadromous rainbow trout) vs. farmed rainbow trout. Several parameters were measured toprovide numerical measurement of the differences in shape, i.e. height:width ratio and the angle between the longitudinal ventricular axis and the axis of the bulbus arteriosus. We conclude that the hearts of farmed fish are rounder than those incorresponding wild fish, and that the angle between the ventricular axis and the axis of the bulbus arteriosus is more acute in wild fish than in their farmed counterparts. Further studies are necessary to reveal the prevalence, functional significanceand possible causes of these abnormal hearts.

【 授权许可】

Unknown